Just to clarify a bit...
At 3:10 PM -0500 7/2/2011, Kris Tilford wrote:
Tiger 10.4 - Two separate versions: one pure PPC System, one pure
Intel System. Some of the software is "universal" (meaning contains
both PPC & Intel code which will work on both architectures, but is
also much larger <bloated> in size).
The ppc-to-x86 code translator, Rosetta, is installed by default in
x86 Tiger, giving it the ability to run ppc-only (non Universal) apps.
Rosetta requires apps that use use at least a G3 processor & Cocoa.
Rosetta does NOT support:
* Applications built for Mac OS 8 or 9 (that was Classic's job).
* Code written specifically for AltiVec
* Code that inserts preferences in the System Preferences pane
* Applications that require a G4 or G5 processor (no processor specific code).
* Applications that depend on one or more kernel extensions
* Kernel extensions
* Bundled Java applications or Java applications with JNI libraries.
Leopard 10.5
Same Rosetta.
32-bit only.
No. The x86 Leopard build includes both a 32-bit and a 64-bit
kernel. It can only boot into the 64-bit kernel, however, if the
hardware supports it (Core 2 or better) and all the kernel extensions
are 64-bit.
Above the kernel, both 64-bit and 32-bit frameworks and apps can run.
"mixed mode".
Snow Leopard 10.6
Snow Leopard contains many more 64-bit components, but is not yet 64-bit pure.
Rosetta is now an optional install.
Lion 10.7 - Intel-only 64-bit-only architecture.
The kernel and all Apple-supplied kernel extensions are 64-bit.
Frameworks and apps can run in either 32-bit or 64-bit mode.
Rosetta won't run, so no more ppc apps. Beyond Jobs' deep seated
desire to fark those of us who are no longer good Revenue Units to
Apple, this does make some sense -- Lion is 64-bit and G3 is 32-bit.
- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.
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